Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eac1356e3b67efe322286cd6e2ecfe2a109af7563a12b554269ca0fb9bfcc499' 
  AND token = '5azrVStssWUcZvrj0VFAfhyICiKudyyJl+gbn7xk1RE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}